Saw-set



No. 770,429. PATENTED SEPT. 20, 1904. IVI. HAWKINS & A. T. PERRY.

SAW SET.

APPLICATION FILED MAY l5. 1903.

N0 MODEL.

AMJ-@Mums UNTTED STATES Patented September 20, 1904.

PATENT OFFICE.

SAW-SET.

SPECIFICATION forming part of Letters Patent No. 770,429, datedSeptember 20, 1904.

Application filed May 15, 1903. Serial No. 157,305. (No model.)

To all whom t may concern/ Beit known that we,MABELLE HAwKINs and ARTHURT. PERRY, citizens of the United States, and residents of Hamilton, inthe county of Marion and State of Iowa, have invented a new and usefulImprovement in Saw- Sets, of which the following is a specification.

Our invention relates to an improvement in saw-sets; and the object isto provide a set which can be attached to a work-bench and operated byhand or foot power.

Another object is to provide a set having the jaws in duplicate of eachother, so they can be drop-forged from one die, and, further, to soconnect and arrange the dies that they can be removed or replaced withfacility.

Still another object is to provide a gage for the teeth to straddle,with a thumb-screw adjustment on the gage to provide for adjusting itfor coarse or iine saw-teeth and to cause the teeth to take the rightposition between the dies.

With these objects in view our invention consists in certain novelfeatures of construction and combinations of parts, which will behereinafter described, and pointed out in the claims.

In the accompanying drawings, Figure 1 is a view in side elevation. Fig.2 is a horizontal section on the line @c a: of Fig. 1. Fig. 3 is a frontview with the jaws open; and Fig. 1 is aview in perspective of the jawsdetached, showing their relative positions with the spring 10 bearingupwardly upon the upper jaw.

A represents a casting cored out at the top to form thetwo side plates 1and 2 and provided with a V-shaped notch 3 at the forward edge. At thelower end the casting is provided with a clamp 11 and a screw 5, bywhich the set is securely clamped to a work-bench or other suitablesupport.

A pair of jaws 6 6' of similar construction are provided, the upper jaw6 being pivoted at its rear end on a pin 7 between the side plates 1 and2 with its forward or operating end extending into the V-shaped notch 3.The pin 7 passes through the rear end of each jaw and is provided with aheaded end, the

opposite end lying beneath and guarded by a gage 16, hereinafterdescribed, the gage preventing the free end of the pin from beingaccidentally hit. When it is desired to remove the jaws, all that isnecessary is is to release the gage 16, so that it may be moved awayfrom the end of the pin, and then knock out the pin. These jaws arepreferably made precisely alike, so both can be made in the same diesand also for convenience in replacing them should one become impaired orbroken. Along the transverse v'median line these jaws are offset inopposite directions, as at 8 and 9, to give the required set to thesawteeth which are engaged between them, one tooth being set in onedirection and the next one in the opposite direction, two teeth beingset at a time, the jaws forming complements of each other. Aspiral-spring 10 is made to bear upwardly on the upper jaw, whereby tonormally maintain it in an elevated position.

An operating-lever 11 is pivoted between the forward ends of the sideplates 1 and 2 on a pin 12, and this lever is provided with'a cam 13,adapted to bear on the upper jaw, whereby to force the jaws togetherwith the required pressure to effect the setting of the saw-teeth. Thislever may be operated by hand or by foot power, and for that purpose.

the lever may have a hole 14: in its outer end adapted to receive a wireor other connection 15, whereby to attach it to a treadle, so that theoperator can work the set by pressing his foot and use both hands toguide and control the saw. i

On one side of the casting a gage 16 is located. This is preferablybeveled at its forward end, which is adapted to be straddled by thesaw-teeth, and at the rear end it has an shaped guide 20 on the oppositeside of the saw is adjustably held in place by screw 21 passing throughthe elongated slot 22.

The operation is of course perfectly clear. The set is clamped to awork-bench or other support with the forward end away from the operator,with the lever extending rearward or toward the operator. The gage isthen set in accordance with the size of the teeth to be set and so as tocenter the teeth between the setting-jaws. The saw is placed so that twoteeth straddle the end of the gage, and when the saw is held in lplacethe operator merely depresses the lever, either by hand or by footpower,thus forcing the jaws together upon the teeth and giving thelatter the required set. The moment he releases the pressure, the springacting on the upper jaw forces it upward, and with it the lever, foranother operation. Then by moving the saw along two more teeth are set,as before.

The machine is a simple and inexpensive one and efectually performs itsfunctions. At the same time it is easily operated, the jaws can bereadily replaced, and their initial cost is measurably reduced by thefact that they are exact duplicates of each other.

It is evident that slight changes might be resorted to in the form andarrangement of the various parts described without departing from thespirit and scope of our invention, and hence we do not wish to limitourselves to the exact construction herein set forth; but,

Having fully described our invention, what We claim as new, and desireto secure by Let,

ters Patent, is-

1. A saw-set comprising a body portion, saw-setting members carrledthereby, means for operating the setting members, a gage comprising aresilient plate adjustably secured to the body portion, one end of thegage-plate adapted to take into the teeth of a saw and an independentadjusting means rotatably carried by the plate, the adjusting meansabutting against the body portion of the saw-set and adapted whenoperated to move the plate toward or from the body portion.

2. A saw-set comprising a main frame, a pair of counterpartinterchangeable jaws attached to the frame at a common point, one ofwhich at least is pivoted therein, said jaws shaped to give the requiredset to the sawteeth, and means supported in the frame independent of thejaws located in position when moved in one direction to force one jawtoward the other.

3. The combination in a saw-set, of a pair of jaws, each jaw comprisinga rear portion, one surface of the rear portion provided with adownwardly-inclined wall, the forward portion joined to the rear portionat thebase of the inclined wall, the forward portion provided with anoppositely-inclined wall offset from the rear portion, the two jawsintermeshing with each other, the forward ends of the jaw membersadapted to engage the sawbody, the inclined walls of the jaw membersengaging the saw-teeth.

In testimony whereof we have signed this specification in the presenceof two subscribing witnesses.

MABELLE HAVVKINS. ARTHUR T. PERRY.

